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slab: add hooks for kmemcheck

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We now have SLAB support for kmemcheck! This means that it doesn't matter
whether one chooses SLAB or SLUB, or indeed whether Linus chooses to chuck
SLAB or SLUB.. ;-)

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
This commit is contained in:
Pekka Enberg 2008-05-09 20:35:53 +02:00 committed by Vegard Nossum
parent 5a896d9e7c
commit c175eea466
1 changed files with 18 additions and 2 deletions
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20
mm/slab.c
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@ -114,6 +114,7 @@
#include <linux/rtmutex.h>
#include <linux/reciprocal_div.h>
#include <linux/debugobjects.h>
#include <linux/kmemcheck.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
@ -179,13 +180,13 @@
SLAB_STORE_USER | \
SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE)
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK)
#else
# define CREATE_MASK (SLAB_HWCACHE_ALIGN | \
SLAB_CACHE_DMA | \
SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \
SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE)
SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK)
#endif
/*
@ -1624,6 +1625,10 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid)
NR_SLAB_UNRECLAIMABLE, nr_pages);
for (i = 0; i < nr_pages; i++)
__SetPageSlab(page + i);
if (kmemcheck_enabled && !(cachep->flags & SLAB_NOTRACK))
kmemcheck_alloc_shadow(cachep, flags, nodeid, page, cachep->gfporder);
return page_address(page);
}
@ -1636,6 +1641,9 @@ static void kmem_freepages(struct kmem_cache *cachep, void *addr)
struct page *page = virt_to_page(addr);
const unsigned long nr_freed = i;
if (kmemcheck_page_is_tracked(page))
kmemcheck_free_shadow(cachep, page, cachep->gfporder);
if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
sub_zone_page_state(page_zone(page),
NR_SLAB_RECLAIMABLE, nr_freed);
@ -3309,6 +3317,9 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
kmemleak_alloc_recursive(ptr, obj_size(cachep), 1, cachep->flags,
flags);
if (likely(ptr))
kmemcheck_slab_alloc(cachep, flags, ptr, obj_size(cachep));
if (unlikely((flags & __GFP_ZERO) && ptr))
memset(ptr, 0, obj_size(cachep));
@ -3367,6 +3378,9 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
flags);
prefetchw(objp);
if (likely(objp))
kmemcheck_slab_alloc(cachep, flags, objp, obj_size(cachep));
if (unlikely((flags & __GFP_ZERO) && objp))
memset(objp, 0, obj_size(cachep));
@ -3483,6 +3497,8 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
kmemleak_free_recursive(objp, cachep->flags);
objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0));
kmemcheck_slab_free(cachep, objp, obj_size(cachep));
/*
* Skip calling cache_free_alien() when the platform is not numa.
* This will avoid cache misses that happen while accessing slabp (which